diff -r f70d74fea67f -r 2a30c7dfe3ed slides/slides04.tex
--- a/slides/slides04.tex	Sun Sep 15 12:57:59 2024 +0100
+++ b/slides/slides04.tex	Mon Jul 21 16:38:07 2025 +0100
@@ -178,10 +178,10 @@
     %%Office: & N\liningnums{7.07} (North Wing, Bush House)\bigskip\\
     Slides \& Code: & KEATS\bigskip\\
 
-    Office Hour: &  Fridays 13:00 -- 14:00\\
+    Office Hour: &  Thursdays 13:00 -- 14:00 (send email first)\\
     Location: & N7.07 (North Wing, Bush House)\bigskip\\
 
-    Pollev: & \texttt{\alert{https://pollev.com/cfltutoratki576}}\\  \\
+    %Pollev: & \texttt{\alert{https://pollev.com/cfltutoratki576}}\\  \\
   \end{tabular}
   \end{center}
 
@@ -518,33 +518,33 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%     
-\begin{frame}[c,fragile]
-\small
-\textcolor{red}{MacOSX}\medskip
-
-\begin{minipage}{13cm}
-  \begin{itemize}
-  \item[0)] (if needed) \texttt{brew install java} \;\;or\;\; \texttt{brew reinstall java}
-  \item[1)] \texttt{curl -s "https://get.sdkman.io" | bash}
-  \item[2)] \texttt{sdk install scala 2.13.7}  
-  \end{itemize}
-\end{minipage}\bigskip
+%\begin{frame}[c,fragile]
+%\small
+%\textcolor{red}{MacOSX}\medskip
+%
+%\begin{minipage}{13cm}
+%  \begin{itemize}
+%  \item[0)] (if needed) \texttt{brew install java} \;\;or\;\; \texttt{brew reinstall java}
+%  \item[1)] \texttt{curl -s "https://get.sdkman.io" | bash}
+%  \item[2)] \texttt{sdk install scala 2.13.7}  
+%  \end{itemize}
+%\end{minipage}\bigskip
   
-\textcolor{red}{Windows / Linux Ubuntu}\medskip
+%\textcolor{red}{Windows / Linux Ubuntu}\medskip
 
-\begin{minipage}{13cm}
-  \begin{itemize}
-  \item[0)] (if needed) \texttt{sudo apt-get remove scala-library scala}
-  \item[1)] {\fontsize{8.5}{8.5}\selectfont\texttt{sudo wget https://downloads.lightbend.com/scala/2.13.7/scala-2.13.7.deb}}
-  \item[2)] \texttt{sudo dpkg -i scala-2.13.7.deb}  
-  \end{itemize}
-\end{minipage}\bigskip
+%\begin{minipage}{13cm}
+%  \begin{itemize}
+%  \item[0)] (if needed) \texttt{sudo apt-get remove scala-library scala}
+%  \item[1)] {\fontsize{8.5}{8.5}\selectfont\texttt{sudo wget https://downloads.lightbend.com/scala/2.13.7/scala-2.13.7.deb}}
+%  \item[2)] \texttt{sudo dpkg -i scala-2.13.7.deb}  
+%  \end{itemize}
+%\end{minipage}\bigskip
 
-\begin{minipage}{13cm}
-other Linux distros: \texttt{sudo apt-get scala}
-\end{minipage}
+%\begin{minipage}{13cm}
+%other Linux distros: \texttt{sudo apt-get scala}
+%\end{minipage}
 
-\end{frame}
+%\end{frame}
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%